In the wake of a catastrophic labor strike, a documentary project brings out class resentments and secret desires in Lee Chang-dong's suggestive drama. The brilliant Korean filmmaker Lee Chang-dong is a suffering protagonist’s best friend, exploring the buried pain in people like no other filmmaker. But he’s never been so delicately novelistic, and so accessibly human, as with his latest movie, “Possible Love,” even when Lee is spinning the enigmatic vibes he’s.